Snowboarders, particularly when they are "littered" all over the mountain or ski area. When not scraping snow off the mountain you can find them taking up entire trails either waiting for their turn on a feature at the terrain park or just hanging out on the slopes.

"Dude, that trail had a ton of knuckle-draggers on it."
"Seriously, there was Mountain trash everywhere."

bassically any broke northern cali medicnal marijuana grower.these guys are the help not the owners of property,they typically live in tents or broke down rvs.generally the have no money and will drink all your beer.

man i went to this hill to trim and the mountain trash drank all my beer and whiskey.